Thame workholding Jaw Boring-Turning Adjustable Ring for Power Chucks
A specifically designed device used to bore, turn or grind jaws very accurately on power chucks under clamping pressure. The Trueborer is infinitely adjustable within its specified clamping range, allowing fine adjustment for minimal skimming of jaws, which can also be through bored in one operation resulting in better T.I.R. of parts. It is available in three sizes covering chucks from 125mm to 600mm diameter.